Conveyer tilting section



Au8- 2 1932- A. L. wAs'HBuRNE 1,869,639

CONVEYER TILTING SECTION Filed Sept. 24. 1930 5 Sheets-Sheet l /4-INVENTOR HR man. L Was//u/vs.

I BY WMM/M2M@ ATToRNEYs Au8 2, 1932 A. l.. wAsHBURNE 1,869,639

CONVEYER TILTING SECTION Filed Sept. 24, 1950 I5 Sheets-Sheet 2 M 77Mgfaz'zzefy Aug. 2, 1932.

A. L. WASHBURNE CONVEYER TILTING SECTION Filed Sept. 24, 1950 3Sheets-Sheet S 66 a 79 'o' zzv mnu lllnl nl Q *73 o 7 '2 72a o fa 75 73INVENT R RTHl/RL. HsHsuRA/f.

BY WMM( Wd@ ATTORNEY Patented Aug. 2, 1932 l: ARTHUR L. WASHBURNE, OFLOS ANGELES, CALIFORNIA, ASSIGNOR T SPARKLETES BOTTLED WATERCORPORATION, 0F LOS ANGELES, CALIFORNIA, A CORPORATION OF CALIFORNIACONVEYER TIL'II'NG SECTION Application ilcd September 24, 1930.

In the transport of bot-tles in crates by means of a conveyer, it isoften desirable to remove the bottles from the crates at a selectedlocation along the line of conveyance and to continue transport of theempty crates. Such operations are employed in beverage bottling plantswhere large bottles to be cleaned are conveyed in their crates adjacentw a bottle auxiliary conveyer or cleaning machine, there removed fromthe crates, transferred to the auxiliary conveyer and the cratescontinued in their transport to another point. The present inventionrelates to a conveyer having carrier mechanism for transporting bottlesin crates in upright position and having a tiltable section adapted fortwo positions, one in line with the other conveyer sections for travelof bottles and the other with the tilting section in unloading position,to

dispose the crates containing bottles on their sides. This enablesconvenient removal and then restoration of the empty crates to uprightposition for further conveyance.

The objects of this invention are to provide f'f.; Such al device havingany 0I all Of the OllOW- ing features: means halting conveyance ofbottles until a selected number of crates and bottles have accumulatedon a tilting section; means to tilt the section with the crates andbottles so accumulated to unloading position;

means to restore the empty crates to upright position and continue theirtravel while another set of crates and bottles are accumulated l on thetilting section; and means to coordii* nate the aforementionedoperations.

is a plan view of the structure shown in Fig.

1 with the auxiliary conveyer omitted; Fig. 3 is an end elevation insection as seen on the line 3 3 of Fig. 1; Fig. 4 is a fragmentary viewsimilar to Fig. 3 showing the tilting section in unloading position;Fig. 5 is an Serial No. 484,123.

end elevation partly in section and on an enlarged scale showing detailsof the gearing for operating the rollers, the section being taken onlines 5-5 of Fig. 2 and 6; Fig. 6 is a section as seen on the line 8--6of Fig. 5; F ig. 7 is a plan view partly in section of the gateoperating valve mechanism as seen on the line 7 7 of Fig. 8; and Fig. 8is an elevation of the structure shown in Fig. 7.

Referring more particularly to Figs. 1 to 4 inclusive, the devicecomprises a conveyer having a tilting section A which bridges aninterruption in the main conveyer whose adjacent sections are marked B1and B2 and is rocked by motive means C. In front of the main conveyor isa sub-conveyor D for bottles removed from the crates. The main conveyersections B1 and B2 are shown having live rollers at their adjacent ends.The subconveyer is shown as a chain type of conveyer.

A supporting frame for the main eonveyer sections comprises posts 10 and11 and-suitable braces not shown which support side bars 12 and 13 inwhich are journalled live carrier rollers 14. In the space betweensections Bl and B2 of the main conveyer is a tilting section spanningthe space.

The tilting section comprises side bars 15 and 16 having journalledtherebetween live rollers 17. A slat side 18 extends from front bar 15and a shorter slat side 19 from the rear bar 16. The slat side 18 servesas a shelf to support crates and bottles when the tilting section ispositioned in unloading position as shown in Fig. 4i. Extending acrossand supporting bars 15 and 16 are sills 2O and 21 overhanging bar 16.Journalled on the overhanging ends of sills and 21 is a drive shaft 22.Idly mounted on the shaft 22 is a segmental gear s3 having a cut outsector 24 within which side bar 16 is welded or otherwise secured, thusbeine' secured to the frame of the tilting platform. Shaft 22 isjournalled at its ends in bearing brackets 25. s

A bearing 2G is journalled on each bracket and secured to a sill, assill 20 in Fig. 8. Thus, the tilting platform is pivotally connected tothe main conveyor frame. Shaft 22 has keyed thereto a gear 27.

1 dournalled on bar 16 is a counter shaft 28 having keyed thereto a gear29 meshing with gear 27, see Figs. 2 and 5. The gear 29 is arranged todescribe a planetary motion about gear 27 when the tilting platform isrocked keeping at all times in mesh with gear 27. Gears 30 and 31 arekeyed to shaft 22 and mesh with pinions 32 and 33 mounted on shafts 34and 35 journalled in bearings 36 and 37 on the end sections B1 and B2 ofthe main conveyer supporting frame. Shaft 28 has fixed to it bevel gears3 8, one for each roller 17 on the tilting platform. Rollers 17 havestub shafts to which are fixed bevel gears 39. Thus, the rollers 17 willbe positively driven from shaft 28. Pinions 32 and 33 have bevel teeth40 to mesh with bevel pinions carried by rollers 14 of the mainconveyer. Bevel gears 39 are mounted on shafts 34 and 35 to mesh withcorresponding gears connected to rollers 14. The specific structureshown only drives a few end rollers of the main conveyer sections. Thedrive shaft 22 is suitably operated by a motor not shown. Thus, at alltimes in all positions of the tilting platform rollers 14, and 17, arepositively driven.

To tilt the platform hydraulically operated motor mechanism is provided.Upstanding from a base 41 is a cylinder having a plunger 43reciprocatingly mounted therein. To the plunger is attached a rod 44carrying a rack 45 at its end. Rack 45 meshes with gear Raising of theplunger causes turning of gear 23 and rocking downwardly of the tiltingplatform. To counterbalance the platform a yoke 46 is fixed to thetilting platform frame and carries removable counterweights 47. Cylinder42 is double acting having ports controlled by a piston valve 48operating in a valve box in a well known manner to alternately place theports in communication with inlet line 49I and exhaust line 50 formotive fluid. Valve piston 48 is manually controlled. A collar 51affixed to its stein has a link 52 pivotally secured thereto and at theother end to a crank arm on a crank shaft 54 jonrnalled in a staizdard55. At the front end of the crank is a handle 56. By rocking the handle56 piston valve 48 may be raised and lowered and thereby the tilting ofthe platform controlled.

Due to the employment of live rollers,

groups of crates and bottles would travel over the tilting section inclosed position unless halted thereon. To this end a gate is provided atth-e discharge end of the tilting section for projection into the pathof the crate filled bottles when the latter are travelling thereon andfor retraction to permit empty crates to leave. T he gate comprises aplate 57 movable upwardly and downwardly between the discharge end ofthe tilting section A an d the adjacent main conveyer section B1. Theplate 57 is mounted upon a plunger 58 rcciprocatingly disposed in acylinder 59 forming a single acting air motor and having a conduit 60for air to pass to and from the cylinder. Valve mechanism shown best inFigs. 7 and 8 is provided to control the inlet of air under pressure andits discharge. It comprises a casing 61 having a bore with a valve seat62 at one end. A head 63 is provided with an inlet connection 64 for airunder pressure supplied by way of a pipe 65. The other head 66 has acentral bore for a valve stem and ports surrounding it to provide adischarge valve seat 67. Slidably mounted in casing 61 is a valve stem68 having a valve head 69 for controlling the ports in seat 62 and ahead 70 on the outside of the casing for controlling the ports in seat67. Heads 69 and 70 are so spaced on stem 68 that when one is seated onits seat the other is off its-seat. A collar 71al on the valve stem hasa compression spring 72a seated between it and the valve seat 62 tendingto hold Valve head 68 seated and valve head 70 unseated. In thisposition, cylinder 59 is connected to the atmosphere and plunger 58 dueto its weight and that of gate 57 would fall placing the gate inretracted position. In inward position of the valve stem 68, valve head70 is seated to close the connection of cylinder 59 to the atmosphereand to open it to air under pressure by way of pipe the inlet ports inseat 62 and pipe 60.

To operate the valve stem 68 it has jointed thereto a snap-over meanscomprising a tog'- gle 71 including links havingA a knuckle 72 formed byclevises and a pin securing a tappet rod 73 therein. The outer link ispivoted to the stationary base. Tappet rod 73 is guided in brackets 74and 75 mounted on the base. and the rod extends beyond both bracket-s.One end of the rod designated by 73a is disposed in the path of theframe of the tilting platform, the other end designated by 7 3b isdisposed to be engaged by the finger 76 which extends laterally from ashaft rod 77. The rod 77 is journalled in upright position projectingabove rail 16 and has an arm 78 arranged to extend along the directionof the conveyer travel. It has an idler roller at the end for engagingthe sides of the crates. The arm 78, rod 77 and finger 76 constitute acontrol.

Assuming, there is a crate on the platform at the arm 78 and theplatform is in closed or upper position, arm 78 will then be heldoutward by the crate and linger 76 outward as shown in Fig. 7. Assumethat toggle 71 is straight. It will. remain in straight position. thelinks being in center and linger 76 clearing the end 73?) of the tappetrod. Gate 57 will be projected or closed. 1f the platform is swung tolower position shown in Fin. 4. the frame of the platform will engageend 73a of the tappet rod buckling the toggle to the position shown inFig. 7. Y Finger 76 will with shaft 77 be positioned away frein thetappet rod to clear the latter. Cylinder 59 will be connected to theatmosphere and gate 57 retracted or lowered. On return of the platformto the position shown in Fig. 3, inger 76 will be returned but will notdisturb the position of the tappet rod 73. The gate remains open. If thecrate or crates maintaining arm 78 in outer position are removed as bytravel along the conveyer runway, arm 78 is swung inward by spring 79 toits normal position moving the tappet rod 73 to straighten the toggle 71and project the gate. Another crate positioned to engage arm 78 outwardwill not disturb the valve mechanism and the gate remains elevated. Theplatform must then be swung downward to buckle the toggle and retractthe gate.

The operation is as follows: the platform is in runway closed positionas shown in Fig. 3. Toggle 71 is straight and gate 57 elevated. Bottlesin crates are conveyed to th-e tilting platform in groups to fill thelatter, such as five bottles and crates. The operator then turns handle56 and the platform is lowered to the position shown in Fig. fi. Theplatform frame kicks tappet 78 to buckle the toggle and gate 57 islowered. The o'perator then removes the bottles from the crates in themanner indicated by dotted lines in Fig. 4 and handle 56 is turned torestore the platform. At all times, the live rollers operate and whenthe crates are upright. they will pass onto section Bl. As the lastcrate of the group passes from the tilting platform` arm 78 is swunginward to cause finger 76 to straighten the toggle and open the valve toadmit air under pressure to cylinder 59. The gate 57 is then raised andis ready to receive another group of bottles and crates. The cycle maythen be repeated.

`What I claim is l. A convever for transporting crates containingbottles comprising a frame work. carrier rollers on said frame work. atiltable frame section. a front wall in said tiltable section for cratesto rest against in unloading position, live carrier rollers in saidframe work disposed in said tiltable section and in adiacent sections ofthe remaining frame work; a roller drive shaft line extending along oneside of said frame work and geared to said live carrier rollers, meanspivoting said tiltable frame section about said live shaft; and motormechanism for swinging said tiltable section.

2. A conveyer for transporting crattrr containing bottles comprising aframe work for carriers and having a tiltable frame section positionablein loading and unloading position; said tiltable frame section beingpivotally mounted on an aXis extending longitudinaily of said conveyer;motor me" nism for swinging said frame section throi its tiltingmovement, a gate at the down side of said tilting section projectableinto the path of crates and retractable therefrom, means to operate saidgate having a control normally positioned to cause said gate to beprojected when said tilting section is in loading position andpositioned by said crates to enable retraction of said gate, said meansbeing operated by said tilting section in unloading position to causeretraction of said gate.

3. A conveycr for transg'iorting crates cortaining bottles comprising aframe work for carriers and having a tiltable frame section positionablein loading and unloading position; said tiltable fralne section beingpivotally mounted on an axis disposed at one lateral edge of the framework and extending longitudinally of said conveyer; manually controlledmotor mechanism for swinging said frame section through the tiltingmovement; a gate at the down side of said tilting section projectableinto the path of crates and retractable therefrom, means to operate saidgate having a control normally positioned to cause said gate to beprojected when said tilting section is in loading position andpositioned by said crates to enable retraction of said gate, said meansbeing operated by said tilting section in unloading position to causeretraction of said gate.

conveyer for transporting crates containing bottles comprising a framework, carrier rollers on said frame work, a tiltable frame sectionpositionable in loading and unloading positions, live carrier rollers insaid frame work disposed in said tiltable section and in adjacentsections of the ren'iaining frame work; a roller drive shaft extendingalong one side of said frame work and geared to said live carrierrollers, means pivoting said tiltable frame section about said shaft;motor mechanism for swinging said tiltable section; a gate at the downside of said tilting` section projectable into the path of crates andretractable therefrom, means to operate said gate having a controlnormally position-ed to cause said gate to be projected when saidtilting section is in l-iadii'ig po and positioned by said crates toenable retraction of said gate, said means being operated by saidtilting section in unloading position to cause retraction of said gate.Y

5. A conveyer for transporting crates containing bottles comprising aframe work having stationary frame sections with a tiltable framesection therebetween, live carrier roller in said frame work disposed insaid tiltable section and in said stationary frame sections; anintermediate carrier driven shaft extending aiong one side of saidtilting section and geared to the carrier rollers thereon, end shafts onthe remaining frame werk geared to carrier rollers thereon, a driveshaft extending along said frame work spanning the tiltable section andjournalled on the stationary sections; means gearing said end shafts tosaid drive shaft and gears arranged in planetary formation gearing saiddrive shaft to said intermediate shaft, means pivotally mounting saidtiltable section on said drive shaft; and motor mechanism for swingingsaid tiltable section.

A conveyer for transporting crates containing bottles comprising a framework having stationary frame sections with a tiltable frame sectiontherebetween, live carrier roller in said frame work disposed in saidtiltable section and in said stationary frame sections; an intermediatecarrier driven shaft extending along one side of said tilting sectionand geared to the carrier rolcrs thereon, end shafts on the remainingframe work geared to carrier rollers thereon, a drive shaft extendingalong said frame work spanning the tiltable section and journalled onthe stationary sections; means gearing said end shafts to said driveshaft and gears arranged in planetary formation gearing said drive shaftto said intermediate shaft, means pivotally mounting said tiltablesection on said drive shaft; motor mechanism for swinging said tiltablesection comprising` a gear secured to said tiltable section, a rackengaged with said gear, a fluid actuated motor to reciprocate said rackand a manually controlled valve to operate said motor.

7. l conveycr for transporting crates containing bottles comprising aframel work having a tiltable frame section positionable in loading andunloading positions; said tiltable frame section being pivotally mountedon an axis extending longitudinally of said conveyer; motor mechanismfor swinging said frame section through its tilting movement; and a gatedisposed at the down side of said tiltable section projectablo into thepath of crates being transported and retractable therefrom, a fluidactuated motor connected to said gate to operate the latter, a valve tocontrol admission of actuating fluid to said motor having positions tocause said motor to project said gate and to effect retraction thereof,valve operating means connected to said valve to actuate the latter andhaving a dead lock position wherein said valve is positioned to causesaid motor to project said gate, means tending to move said valveoperating means from dead lock position to retraction position to effectretraction of said gate. a control for operation on said valve operatingmeans positionable to move the latter to dead lool( position or to clearsaid valve operating means and enable it to be positioned in retractionposition. said control havingl an element operated by crates in saidtiltable section to position the control in clearing position, saidvalve operating means being engaged by said tilting section in unloadingposition to position the valve operating means in retraction position.

8. A conveyer for transporting crates containing bottles comprising aframe work having a tiltable frame section positionable in loading andunloading positions; said tiltable frame section being pivotally mountedon an axis extending longitudinally of said conreyer; motor mechanismfor swinging said frame section through its tilting movement; a gatedisposed at the down side of said tiltable section projectable into thepath of crates being transported and retractable therefrom, a fluidactuated motor connected to said gate to operate the latter, a valve tocontrol admission of actuating fluid to said motor having positions tocause said motor to project said gate and to effect retraction thereof,snapover means connected to said valve to operate the latter and havinga dead center position wherein said valve is positioned to canse saidmotor to project said gate, means tending to move said snap-over meansover center to position said valve to effect retraction of said gate, acontrol for operation on said snap-over means positionable to move thelatter to dead center position or to clear said snap-over means andenable it to be positioned in over center position, said control havingan element operated by crates in said tiltable section to position thecontrol in snap-over clearing position, said snap-over means beingengaged by said tilting section in unloading position to position thesnap-over means over center.

9. A conveyer for transporting crates containing bottles comprising aframe work, carrier rollers on said frame work, a tiltable frame sectionpositionable in loading and unloading positions, live carrier rollers insaid frame work disposed in said tiltable section and in adjacentsections of the remaining frame work; a roller drive shaft lineextending along one side of said frame work and geared to said livecarrier rollers, means pivoting said tiltable frame section about saidshaft; motor mechanism for swinging said tiltable section; and a gatedisposed at the down side of said tiltable section projectable into thepath of crates being transported and retractable therefrom, a fluidactuated motor connected to said gate to operate the latter, a valve tocontrol admission of actuating fluid to said motor having positions tocause said motor to project said gate and to effect retraction thereof,valve operating means connected to said valve to actuate the latter andhaving a dead lock position wherein said valve is positioned to causesaid motor to project said gate, means tending to move said valveoperating means from dead lock position to retraction position, toeffect retraction of said gate, a control for operation on said valveoperating means positionable to move the latter to dead lock position orto clear said valve operating means and enable it to be positioned inretraction position, said control having an element operated by cratesin said tiltable section to position the control in clearing position,said valve operating means being engaged by said tilting section inunloading position to position the valve operating means in retractionposition.

10. A conveyer for transporting crates containing bottles comprising aframe Work, carrier rollers on said frame work, a tiltable frame sectionpositionable in loading and unloading positions, live carrier rollers insaid frame Work disposed in said tiltable section and in adjacentsections of the remaining frame work; a roller drive shaft line eX-tending along one side of said frame work and geared to said livecarrier rollers, means pivoting said tiltable frame section about saidshaft; motor mechanism for swinging said tiltable sections; a gatedisposed at the down side of said tiltable section projectable into thepath of crates being transported and retractable therefrom, a fluidactuated motor connected to said gate to operate the latter, a valve tocontrol admission of actuating fluid to said motor having positions tocause said motor to project said gate and to effect retraction thereof,snap-over means connected to said valve to operate the latter and haringa dead center position wherein said valve ispositionedtocausesaidmotorto project said gate, means tending to movesaid snap-over means over center to position said valve to effectretraction of said gate, a control for operation on said snap-over meanspositionable to move the latter to dead center position or to clear saidsnap-over means and enable it to be positioned in over center position,said control having an element operated by crates in said tiltablesection to position the control in snapover clearing position, saidsnap-over means being engaged by said tilting section in unloadingposition to position the snap-over means over center.

l1. A conveyer for transporting crates containing bottles comprising aframe Work having stationary frame sections with a tiltable framesection therebetween, live carrier roller in said frame work disposed insaid tiltable section and in said stationary frame sections; anintermediate carrier driven shaft extending along one side of saidtilting section and geared to the carrier rollers thereon, end shafts onthe remaining frame Work geared to carrier rollers thereon, a driveshaft extending along said frame work spanning the tiltable section andjournalled on the stationary sections; means gearinfr said end shafts tosaid drive shaft and gears arranged in planetary formation gearing saiddrive shaft to said intermediate shaft, means pivotally mounting saidtiltable section on said drive shaft; motor mechanism for swinging saidtiltable section. and a gate disposed at the down side of said tiltablesection projectable into the path of crates being transported andretractable therefrom, a fluid actuated motor connected to said gate tooperate the latter, a valve to control admission of actuating fluid tosaid motor having positions to cause said motor to project said gate andto effect retraction thereof, valve operating means connected to saidvalve to actuate the latter and having a dead lock position wherein saidvalve is positioned to cause said motor to project said gate, meanstending to move said valve operating means from dead lock position toretraction position to effect retraction of said gate, a control foroperation of said valve operating means positionable to move the latterto dead lock position or to clear said valve operating means and enableit to be positioned in retraction position, said control having anelement operated by crates in said tiltable section to position thecontrol in clearing position, said valve operating means being engagedby said tilting section in un-f loading position to position the valveoperating means in retraction position.

l2. A conveyer for transporting crates containing bottles comprising aframe work having stationary frame sections With a tiltable framesection therebetween, live carrier rollers in said frame Work disposedin said tiltable section and in said stationary frame sections; a gatedisposed at the down side of said tiltable section projectable into thepath of crates being transported and retractable therefrom, a fluidactuated motor connected to said gate to operate the latter, a Valve tocontrol admission of actuating fluid to said motor having positions tocause said motor to project said gate and to effect retraction thereof,a snap-over means connected to said valve to operate the latter andhaving a dead center position wherein said valve is positioned to causesaid motor to project said gate, means tending to move said snap-overmeans over center to position said valve t-o effect retraction of saidgate, a control for operation on said snap-Over means positionable tomove the latter to dead center position or to clear said snap-over meansand enable it to be positioned in over center position, said controlhaving an element operated by crates in said tiltable section toposition the control in snap-over clearing position, said snapover meansbeing engaged by said tilting section in unloading position to positionthe snap-over means over center.

13. A conveyer for transporting crates containing bottles comprising aframe work having stationary frame sections with a tiltable framesection therebetween, live carrier rollers in said frame work disposedin said tiltable section and in said stationary frame sections; anintermediate carrier driven shaft extending along one side of saidtilting section and geared to the carrier rollers thereon, and shafts onthe remaining frame Work geared to carrier rollers thereon, a

drive shaft extending along said frame Work spanning the tiltablesection and journalled on the stationary sections; means gearing saidend shafts to said drive shaft and gears arranged in planetary formationgearing said drive shaft to said intermediate shaft, means pivotallymounting said tiltable section on said drive shaft; and motor mechanismfor swinging said tiltable section comprising a gear secured to saidtiltable section, a rack engaged with said gear, a Huid actuated motorto reciprocate said rack and a manually controlled valve to operate saidmotor; and a gate disposed at the down side of said tiltable sectionprojectable into the path of crates being transported and retractabletherefrom, a fluid actuated motor connected to said gate to operate thelatter, a valvc to control admission of actuating fluid to said motorhaving positions to cause said motor to project said gate and to effectretraction thereof, valve operating means connected to said valve toactuate the latter and having a dead lock position wherein said valve ispositioned to cause said motor to project said gate, means tending tomove said valve operating means from dead lock position to retractionposition to effect retraction of said gate, a control for operation onsaid valve operating means positiona-ble to move the latter to dead lockposition or to clear said valve operating means and enable it to bepositioned in retraction position, said control having an elementoperated by crates in said tiltable section to position the control inclearing position, said valve operating means being engaged by saidtilting section in unloading position to position the valve operatingmeans in retraction position.

14. A conveyer for transporting crates containing bottles comprising aframe work having stationary frame sections with a tiltable framesection therebetween, live carrier rollers in said frame work disposedin said tiltable section and in said stationary frame' sections; anintermediate carrier driven shaft extending along one side of saidtilting section and geared to the carrier rollers thereon, and shafts onthe remaining frame work geared to carrier rollers thereon, a driveshaft extending along said frame work spanning the tiltable section andournalled on the stationary sections; means gearing said end shafts tosaid drive shaft and gears arranged in planetary formation gearing saiddrive shaft to said intermediate shaft, means pivotally mounting saidtiltable section on said drive shaft; and motor mechanism for swingingsaid tiltable section comprising a gear secured to said tiltablesection, a rack engaged with said gear, a fluid actuated motor toreciprocate said rack and a manually controlled valve to operate saidmotor; and a gate disposed at the down side of said tiltable sectionprojectable into the path of crates being transported and retractabletherefrom, a fluid actuated motor connected to said gate to operate thelatter, a valve to control admission of actuating fluid to said motorhaving positions to cause said motor to project said gate and to effectretraction thereof, snap-over means connected to said valve to operatethe latter and having a dead center position wherein said valve ispositioned to cause said motor to project said gate, means tending tomove said snap-over means over center to position said valve to effectretraction of said gate, a control for operation on said snap-over meanspositionable to move the latter to dead center position or to clear saidsnap-over means and enable it to be positioned in over center position,said control having an element operated by crates in said tiltablesection to position the control in snapover clearing position, saidsnap-over means being engaged by said tilting section in unloadingposition to position the snap-over means over center.

In witness that I claim the foregoing I have hereunto subscribed my namethis 19th day of September, 1930.

ARTHUR L. WASHBURNE.

